When upgrading to Linux 8 of your Database System (Oracle Base Database), using the console, you will lose some settings that you have made manually.
What will you CERTAINLY lose:
* changes in /etc/fstab LOST
* extra directory in /opt/ LOST
* all stuff in /home/oracle (scripts, changes in .bash_profile)
* extra mounted Filesystems. If they are external, you will need to put them back in /etc/fstab and remount.
* /etc/cron.allow is gone
* crontab of user oracle is gone (probably all crontabs!)
* contents of database directory objects if they are not on /u01, /u02, /u03!!
What goes ok:
- extra stuff stored in /u01 /u02 /u03 (if you use Filesystem storage)
- extra entries in tnsnames.ora (which is in $ORACLE_HOME on u01)
- The external /mnt to a filesystem is gone, but the filesystem itself is ok. Just remount it.
MAKE SURE TO BACKUP ALL BEFORE YOU START UPGRADE
